package com.voicechat.firstmet.utils;

import android.content.Context;
import android.os.Environment;

import java.io.File;
import java.math.BigDecimal;

/**
 * @ProjectName: FirstMet
 * @Package: com.voicechat.firstmet.utils
 * @ClassName: DataCleanManager
 * @Description: 缓存工具类
 * @Author: ljp
 * @CreateDate: 2018/11/1 19:18
 * @Version: 1.0
 */
public class DataCleanManager {

        /**
         * 获取缓存大小
         * @param context
         * @return
         * @throws Exception
         */
        public static String getTotalCacheSize(Context context) throws Exception {
            long cacheSize = getFolderSize(context.getCacheDir());
            if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
                cacheSize += getFolderSize(context.getExternalCacheDir());
            }
            return getFormatSize(cacheSize);
        }

        /**
         * 清除缓存
         * @param context
         */
        public static void clearAllCache(Context context) {
            deleteDir(context.getCacheDir());
            if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
                deleteDir(context.getExternalCacheDir());
            }
        }

        private static boolean deleteDir(File dir) {
            if (dir != null && dir.isDirectory()) {
                String[] children = dir.list();
                for (int i = 0; i < children.length; i++) {
                    boolean success = deleteDir(new File(dir, children[i]));
                    if (!success) {
                        return false;
                    }
                }
            }
            return dir.delete();
        }

        // 获取文件大小
        //Context.getExternalFilesDir() --> SDCard/Android/data/你的应用的包名/files/ 目录，一般放一些长时间保存的数据
        //Context.getExternalCacheDir() --> SDCard/Android/data/你的应用包名/cache/目录，一般存放临时缓存数据
        public static long getFolderSize(File file) throws Exception {
            long size = 0;
            try {
                File[] fileList = file.listFiles();
                for (int i = 0; i < fileList.length; i++) {
                    // 如果下面还有文件
                    if (fileList[i].isDirectory()) {
                        size = size + getFolderSize(fileList[i]);
                    } else {
                        size = size + fileList[i].length();
                    }
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
            return size;
        }

        /**
         * 格式化单位
         * @param size
         * @return
         */
        public static String getFormatSize(double size) {
            double kiloByte = size / 1024;
            if (kiloByte < 1) {
//            return size + "Byte";
                return "0K";
            }

            double megaByte = kiloByte / 1024;
            if (megaByte < 1) {
                BigDecimal result1 = new BigDecimal(Double.toString(kiloByte));
                return result1.setScale(2, BigDecimal.ROUND_HALF_UP)
                        .toPlainString() + "K";
            }

            double gigaByte = megaByte / 1024;
            if (gigaByte < 1) {
                BigDecimal result2 = new BigDecimal(Double.toString(megaByte));
                return result2.setScale(2, BigDecimal.ROUND_HALF_UP)
                        .toPlainString() + "M";
            }

            double teraBytes = gigaByte / 1024;
            if (teraBytes < 1) {
                BigDecimal result3 = new BigDecimal(Double.toString(gigaByte));
                return result3.setScale(2, BigDecimal.ROUND_HALF_UP)
                        .toPlainString() + "GB";
            }
            BigDecimal result4 = new BigDecimal(teraBytes);
            return result4.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString()
                    + "TB";
        }
}
